JPH10191746A - Wheel traveling type bush cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure capable of performing smooth bush cutting work by making a wheel traveling type bush cutter A freely turnable. SOLUTION: In this wheel traveling type bush cutter A, an engine 2 is fixed on the upper surface of a base plate 1. Also, an insertion cylinder 3 is projected from one end edge in a longitudinal direction of the base plate 1 and a reaping part 6 operated by the engine 2 is provided on the tip part. To the other end part in the longitudinal direction of the base plate 1, the base end part of a shaft 8 extended to an upper side part is fixed. An operation handle 9 is provided on the tip part of the shaft 8. Further, a pair of wheels 10 are provided on both ends in a width direction of the base plate 1 and the wheels 10 are freely turnable by a turning means 11. Thus, by operating the operation handle 9, a pair of the wheels 10 are turned through the turning means 11 and the wheel traveling type bush cutter A is turned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bush cutter used for mowing and the like, and more particularly, to providing operability by providing wheels that can be turned in at least one direction (either right or left or right or left). An object of the present invention is to provide a wheel-running brush cutter that can be improved to perform a brush cutter operation smoothly.

[0002]

2. Description of the Related Art Brush cutters have been widely used in the past to efficiently perform cutting in orchards such as citrus fruits such as tangerines and pears. Conventionally known brush cutters include those having various configurations such as those described in Japanese Patent Application Laid-Open No. 6-292433. However, basically, a rotary power of an engine is provided in an operating rod. A transmission is provided to a cutting unit such as a cutting blade attached to one end of the operating rod via a transmission shaft, and the weeds are cut by rotation of the cutting unit.

[0003] When a mowing operation such as mowing is performed using the mower described above, a mowing unit such as a mowing blade is rotated by the engine. Then, the user performs a mowing operation while gripping the operation handle provided on the operation rod and swinging (rotating) the operation rod left and right.

[0004]

In the meantime, when the mowing operation is performed by using the above-described mower, the following inconveniences may occur depending on the working place. That is, in an orchard such as a pear garden or a vineyard, a lattice-shaped shelf may be provided over the entire orchard in order to improve the convenience of harvesting work or the like. When performing a mowing operation in an orchard in which such shelves are stretched, the operator must bend down and perform the mowing operation due to the shelves being stretched at a relatively low position. I can't get it. In addition, the citrus orchard such as the above-mentioned tangerine may be provided on a slope depending on the area. Further, the above citrus fruits are also cultivated in a vinyl house in order to shift the harvest time. In such a case, the mowing operation must be performed while leaning down. Performing the mowing operation while leaning down in this manner not only requires a large amount of labor but also causes adverse effects such as deterioration in visibility and difficulty in controlling the position of a mowing portion such as a cutting blade. As a result, there is a possibility that the cutting section such as the cutting blade may be erroneously brought into contact with the fruit tree, thereby damaging the fruit tree.

The wheel-running brush cutter of the present invention has been devised in view of the above-mentioned circumstances, and the brush cutter is provided with a pair of wheels so that the brush cutter can travel freely.
It is an object of the present invention to provide a wheel-running brush cutter capable of improving the operation performance of the pair of wheels by turning the pair of wheels in at least one direction so that the brush cutting operation can be performed smoothly.

[0006]

According to a first aspect of the present invention, there is provided a wheel-running brush cutter, wherein a power source fixed to an upper surface of a substrate and a power source fixed to the upper surface of the substrate protrude from one longitudinal edge of the substrate. A mowing unit provided by the power source, a shaft having a base end fixed to the other longitudinal end of the substrate, extending obliquely upward, and an operation handle provided at a distal end of the shaft. A pair of wheels provided at both ends in the width direction of the substrate; and turning means for turning the pair of wheels in at least one direction by operating the operation handle.

The specific structure of the turning means described in claim 2 is such that the wheel is pivotally supported at one end thereof, and these one ends are pivotally supported at both ends in the width direction of the substrate. A pair of pivot arms, a coupling arm that couples the other ends of the pair of pivot arms, a pivot plate that is rotatably provided on the shaft, and that fixes the operation handle, The first and second transmission plates are fixed, and the first transmission plate and the connecting arm are engaged by the first engagement means, and the second transmission plate is engaged by the second engagement means. And the turning plate is engaged, whereby the turning of the operating handle turns in the turning direction of the operating handle to turn the wheel through the connecting plate and the pair of pivot arms. A lever and a return spring for returning the operation handle to a neutral position. That. The return spring may be fixed to the distal end of the shaft with the transmission rod inserted, and provided between the support plate and the rotating plate.

Further, each of the first and second engagement means can be configured as described in claim 4.
That is, the first engagement means includes a hole formed in the first transmission plate and a projecting pin formed in the connection plate and engaged with the hole. Further, the second engaging means comprises a hole formed in the second transmission plate, and a projecting pin formed in the rotating plate and engaged with the hole.

Further, by providing a chrysanthemum seat at an intermediate portion of the shaft, the first half portion of the shaft can be turned up at a desired angle and the chrysanthemum of the transmission rod can be turned upside down. It is also possible to provide a structure in which a pivot portion is provided at a position corresponding to the seat, and the transmission rod can be folded up with the shaft.

According to a sixth aspect of the present invention, the turning means is pivotally supported at one end of each of the turning means, and these one ends are pivotally supported at both ends in the width direction of the substrate. A pair of pivot arms, a connecting arm that connects the other ends of the pair of pivot arms, and a pair of pivot arms extending toward the center in the width direction of the substrate. An extension plate fixed to one of the pivot arms, an operation lever attached to the operation handle, displaceable by applying a force toward the operation handle, and capable of returning by releasing the force; A wire having one end connected to the operation lever and the other end connected to the extension plate, and a member fixed to the shaft or a member fixed to the substrate and the extension plate provided between the extension plate, Return the pivot arm to a neutral position And a return spring.

Further, the specific structure of the turning means described in claim 7 is provided on the lower surface of the substrate so as to be rotatable, and at both ends thereof a turning plate for pivotally supporting the wheel; An operation lever that is attached to the operation handle and that is displaced by applying a force toward the operation handle and that can be returned by releasing the force, and one end of which is connected to the operation lever, A return that is provided between a wire connected to the other end, a member fixed to the shaft or a member fixed to the substrate, and the other end of the turning plate, and returns the turning plate in a displaced state to a neutral position. And a spring. In the case of such a configuration, as described in claim 8, at the neutral position of the turning plate, a stopper may be provided to abut on a member fixed to the turning plate.

Further, in a wheel-running brush cutter equipped with a turning means having wires as a constituent element (the turning means according to claims 6 and 7), a chrysanthemum is provided at an intermediate portion of the shaft. By providing the seat, the first half portion of the shaft can be turned up at a desired angle.

[0013]

The operation of the wheel-running brush cutter of the present invention constructed as described above is performed as follows. That is, the power source is activated to bring the reaping unit into the operating state. In this state, the operator grips the operating handle provided at the tip of the shaft, and performs the brushing operation while running the wheel-driven brush cutter in a desired direction. In particular, in the wheel-running brush cutter of the present invention, a pair of wheels are provided, and the pair of wheels are moved in at least one direction (in other words, both left and right directions or left and right directions) by operating the operation handle. (In any one direction). For this reason, an orchard in which shelves are stretched as described above, an orchard provided on a slope, or a vinyl house (hereinafter referred to as an orchard such as tangerine).
Even when the mowing work is performed, the labor burden does not increase, and the position of the mowing part can be easily controlled.
Smooth mowing work can be performed.

When the turning means described in claim 2 is employed as the turning means provided in the wheel-running brush cutter of the present invention, if the operating handle is turned in a desired direction about the center axis of the shaft, The pair of wheels can be turned in the desired direction. That is, by rotating the operation handle, the transmission rod rotates in the same direction as the rotation direction of the operation handle via the rotation plate and the second engagement means. As a result, the connecting arm is displaced in the direction corresponding to the rotation direction of the operation handle via the first engagement means, so that the pair of pivot arms connected to the connection arm rotate the operation handle. The pair of wheels are displaced in a direction corresponding to the direction, and the pair of wheels are synchronously turned in the turning direction of the operation handle. In this manner, the pair of wheels can be easily turned, so that the wheel-driven mower can be easily turned.

In order to move the wheel-running brush cutter from the turning state to the straight traveling state, the force for rotating the steering handle is released. That is, in this configuration, a return spring is provided, and the steering handle is turned against the elasticity of the return spring. Therefore, when the above force is released, the steering wheel returns to the neutral position by the elasticity of the return spring. As a result, the pair of wheels synchronize and return to the original state (turning) via the rotating plate, the second engaging means, the transmission rod, the first engaging means, the connecting arm, and the pair of pivoting arms. (The state where it has not been done).

Further, when the turning means described in claim 6 is employed as the turning means provided in the wheel-running brush cutter of the present invention, if a force directed to the operation handle is applied to an operation lever, the pair of wheels is provided. Can be turned in one direction (one of the left and right directions). That is, by applying a force toward the operation handle to the operation lever, the wire is pulled and the extension plate is displaced. Along with this, the pivot arm fixing this extension plate is displaced,
The other arm is simultaneously displaced in the same direction via the connecting arm connected to the arm. As a result, the pair of wheels turns synchronously in the one direction. As described above, the pair of wheels can be easily turned in one direction, so that the wheel-driven brush cutter can be easily turned in one direction.

In order to move the wheeled brush cutter from the turning state to the straight traveling state, the force applied to the operation lever is released, and
Return the operation lever. According to a sixth aspect of the present invention, a return spring is provided between the member fixed to the shaft or the member fixed to the substrate and the extension plate. By applying the force to the operation lever, the extension plate rotates against the elasticity of the return spring.
Therefore, when the force is released, the wire can return to the original state, and the extension plate returns to the neutral position by the elastic force of the return spring. As a result, the pair of wheels returns to the original state (non-turning state) synchronously via the pivot arm, the connecting arm, and the other pivot arm to which the extension plate is fixed.

Further, in the case where the turning means according to the present invention is employed as the turning means provided in the wheel-running brush cutter of the present invention, if a force toward the operation handle is applied to the operation lever, the pair of wheels is provided. Can be turned in one direction. That is, by applying a force toward the operation handle to the operation lever, the wire is pulled, and the revolving plate is displaced in one direction (one of the left and right directions) corresponding to the direction in which the wire is pulled. As a result, the pair of wheels provided on the revolving plate rotate in the one direction in synchronization. As described above, the pair of wheels can be easily turned in one direction, so that the wheel-driven brush cutter can be easily turned in one direction.

In order to move the wheel-running brush cutter from the turning state to the straight traveling state, the force applied to the operation lever is released, and
Return the operation lever. In the turning means described in claim 7, a return spring is provided between a member fixed to the shaft or a member fixed to the substrate and the other end of the turning plate. Then, by applying the force to the operation lever, the revolving plate rotates against the elasticity of the return spring. Accordingly, when the force is released, the wire can return to the original state, and the revolving plate returns to the neutral position by the elastic force of the return spring. As a result, 1
The wheels of the pair return to the original state (the state of not turning) in synchronization.

Further, if the shaft of the wheel-running brush cutter according to the present invention can be folded up by the chrysanthemum seat, an operation provided on the shaft according to the height of the shelf or the vinyl house or the height of the worker, etc. Because you can change the height position of the handle,
Operability is further improved, which can contribute to smoothing of the mowing work.

[0021]

Embodiments of the present invention will be described below. 1 to 8 show a first example of an embodiment of the present invention. The wheel-running brush cutter A in this example has an engine 2 fixed to the upper surface of a substrate 1 and an insertion cylinder 3 through which a transmission shaft (not shown) rotated by the power of the engine 2 is inserted in the longitudinal direction of the substrate 1. (Left and right directions in FIGS. 2 and 3) Protrude to one end side (left end in FIGS. 2 and 3). That is, as shown in FIG. The engine 2 is a power source described in the claims. The engine 2 is provided with a recoil starter having a starter knob, and can be started by pulling the starter knob. or,
Reference numeral 4 denotes a fuel tank for storing fuel of the engine 2.

At the tip of the insertion tube 3 (the left end in FIG. 1),
A reaping section 6 is provided via a gear box 5 for transmitting the rotation of the transmission shaft. In the illustrated example, a thread blade is used as the cutting unit 6, but another type such as a cutting blade may be used. Reference numeral 7 denotes a cover that covers the reaper 6.
The configuration for rotationally driving the mowing unit 6 as described above is the same as that of a conventionally known mower.

At the other end in the longitudinal direction of the substrate 1 (right end in FIGS. 2 and 3), a base end of a shaft 8 extending obliquely upward from the substrate 1 as shown in FIG. 3 (left end). An operation handle 9 is provided at the tip of the shaft 8. Wheels 10 made of a wheel, a rubber tire, and the like are provided at both ends of the substrate 1 in the width direction (vertical direction in FIG. 2 and horizontal direction in FIG. 4). In addition, 1
A desired camber angle is provided on the pair of wheels 10 in order to smoothly turn and return the wheels 10. Further, by operating the operation handle 9, the pair of wheels 10 is moved through the turning means 11 described below, as shown in FIG.
Can be freely turned to the state shown by the dashed line.

The turning means 11 comprises a pair of pivot arms 12
A connecting arm 13, a rotating plate 14, a transmitting rod 17 having first and second transmitting plates 15 and 16 fixed to both ends, and a supporting plate 18.
And a return spring 19. The pair of pivot arms 1
2 is the wheel 1 at one end (the left end in FIG. 2).
2, and one end of each is pivotally supported at both ends in the width direction of the substrate 1 as shown in FIGS. A hanging piece 12 a is provided at one end of the pivot arm 12 to support the wheel 10. The connecting arm 13 connects the other ends (the right ends in FIG. 2) of the pair of pivot arms 12. The turning plate 14 is rotatably provided on the shaft 8 as shown in FIGS. 6 and 7, and the operation handle 9 is fixed to one end (the lower end in FIG. 6).

Further, the transmission rod 17 is connected to the first transmission plate 15 and the connecting arm 1 by first engagement means 20 described below.
3 and the second engaging means 2 described below.
1 engages the second transmission plate 16 with the rotary plate 14. As a result, the connection arm 1 is rotated in the rotation direction of the operation handle 9 by the rotation of the operation handle 9.
The wheel 10 is turned through three and a pair of pivot arms 12. As shown in FIGS. 6 and 7, the support plate 18 is provided to rotatably support the transmission rod 17.
Is externally fitted and fixed to the distal end side of. Further, the return spring 19
Is provided between the support plate 18 and the rotary plate 14 to return the operation handle 9 to the neutral position as shown in FIGS. In the case of this example, the support plate 18
Protrusions are provided at positions where the surfaces facing each other and the rotating plate 14 are aligned with each other, and a coil spring is provided as a return spring 19 via these protrusions. The return spring 19 is constructed by providing a single coil spring between the support plate 18 and the rotary plate 14 as described above. And a pair of coil springs may be provided between them. Reference numeral 18a denotes a support member for rotatably supporting the transmission rod 17 similarly to the support plate 18.

The first engagement means 20 for engaging the first transmission plate 15 with the connection arm 13 includes an elongated hole 22 formed in the first transmission plate 15 and a connection hole formed in the connection arm 13. And a projecting pin 23 engaged with the elongated hole 22. In order to configure the first engagement means 20 as described above, a hanging wall 13a is formed at an intermediate portion of the connecting arm 13, and a projecting pin 23 is provided on the hanging wall 13a. A second engaging means 21 for engaging the second transmission plate 16 with the rotary plate 14 is formed on the second transmission plate 16 as shown in FIGS. Hole 24 formed in the rotating plate 14 and the hole 24
And a protruding pin 25 that engages with In addition, as the first engagement means 20, for example, a projection pin is provided on the first transmission plate 15, and a pair of projection walls is provided on the connecting arm 13, instead of the above configuration. It is also possible to adopt a configuration in which the protruding pin presses one of the protruding walls corresponding to the turning direction with the rotation to displace the connecting arm 13. Further, as the second engagement means 21, the members 16 and 14 provided with the holes 24 and the protruding pins 25 in the above-described configuration can be reversed.

Further, in the case of the present embodiment, a chrysanthemum seat 26 is provided at an intermediate portion of the shaft 8 as shown in FIGS. 7 and the left half of FIGS. 7 and 8) can be folded up at a desired angle. For this purpose, in the transmission rod 17, a pivotal support 27 is provided at a position corresponding to the chrysanthemum seat 26 at an intermediate portion of the transmission rod 17, and the transmission rod 17 can be folded up with the shaft 8 being folded. . As the pivot 27, a transmission rod 172 is divided, and a U-shaped member 29 having a pair of long holes 28 is fixed to an end of a front half of the transmission rod 172. The shaft portion 30 is fixed to the shaft portion 30, and both ends of the shaft portion 30 are inserted into the pair of long holes 28.

The operation at the time of performing the mowing operation using the wheel-traveling type mower A of the present embodiment configured as described above is as follows. That is, the engine 2 is started to bring the reaping unit 6 into an operating state. In this state, the operator grips the operation handle 9 provided at the distal end of the shaft 8 and performs the brushing operation while running the wheel-driven brush cutter A in a desired direction.

In particular, in the wheel-running brush cutter A of this embodiment, a pair of wheels 10 is provided, and the pair of wheels 10 are
Is provided with a turning means 11 which can be turned in any of the width directions. Therefore, if the operation handle 9 is rotated in a desired direction (clockwise and counterclockwise around the central axis) about the central axis of the shaft 8,
The pair of wheels 10 can be turned in the desired direction. As a result, the wheel traveling brush cutter A can be easily driven in a desired direction. Therefore, even when the mowing operation is performed in the orchard such as the aforementioned tangerine or the like, the labor load does not increase, and the position of the mowing unit 6 can be easily controlled. Then, smooth mowing work can be performed.

That is, by rotating the operation handle 9, the transmission rod 17 rotates in the same direction as the rotation direction of the operation handle 9 via the rotation plate 14 and the second engagement means 21. As a result, the connecting arm 1 is connected via the first engaging means 20.
3 is displaced in a direction corresponding to the rotation direction of the operation handle 9, so that a pair of pivot arms 12
Is displaced in a direction corresponding to the turning direction of the operation handle 9 to synchronously turn the pair of wheels 10 in a direction corresponding to the turning direction of the operation handle 9. Since the pair of wheels 10 can be easily turned in this way, the wheel traveling brush cutter A can be easily turned.

In order to move the wheeled brush cutter A from the turning state to the straight traveling state, the force for turning the operation handle 9 is released. That is, the support plate 18 and the rotating plate 1
4, a return spring 19 is provided, and the operation handle 9 is rotated against the elasticity of the return spring 19.
Therefore, when the above-mentioned force is released, the operating handle 9 returns to the neutral position by the elasticity of the return spring 19. As a result, the pair of wheels 10 are synchronized via the rotating plate 14, the second engagement means 21, the transmission rod 17, the first engagement means 20, the connecting arm 13, and the pair of pivot arms 12. To return to the original state (non-turning state).

Further, since the shaft 8 of the wheel-running brush cutter A of the present embodiment can be turned upright by the chrysanthemum seat 26, the shaft 8 can be adjusted according to the height of the shelf or the vinyl house or the height of the worker. The height position of the operation handle 9 provided can be changed. Therefore, the operability is further improved, and it is possible to contribute to smooth and easy mowing.

Since the wheel-running brush cutter A of this embodiment is constructed and operates as described above, the operating handle 9 is connected to the shaft 8.
By rotating the pair of wheels 10 in a desired direction about the center axis of the wheel, the pair of wheels 10 can be turned in the desired direction, and the wheel-running brush cutter A can be turned freely. Therefore, as described above, even when the mowing operation is performed in the orchard such as the tangerine, the labor load is not increased, and the position of the mowing blade can be easily controlled. For this reason, the possibility of damaging the fruit tree is extremely reduced, and a smooth mowing operation can be performed.

Next, FIGS. 9 to 11 show a second example of the embodiment of the present invention. Note that the structure of this embodiment is similar to that of the turning means 3.
1 has a feature, and other configurations and operations are almost the same as those of the above-described first example. Therefore, the same parts are denoted by the same reference numerals, and the duplicated description is omitted or simplified. The description will focus on the turning means 31 which is a characteristic part of the above.

The pivoting means 31 in this embodiment includes a pair of pivot arms 12, a connecting arm 13, an extension plate 32, and an operation lever 3.
3, an operation wire 34, and a return spring 35. The pair of pivot arms 12 has the same configuration as the pivot arm in the first example described above, and the wheel 10 is pivotally supported at one end (the left end in FIGS. 10 and 11). I have.
Then, these one ends are respectively connected to the width direction of the substrate 1 (FIG.
0 (vertical direction). Also, the connecting arm 13 is configured similarly to the connecting arm in the above-described first example structure, and the other end of the pair of pivoting arms 12 (FIG. 1).
0, 11). However, the connecting arm 13 in this example does not need to be provided with a hanging wall, and has a simple plate shape.

The extending plate 32 extends toward the center in the width direction of the substrate 1 and is provided with one of the pair of pivot arms 12 (the lower one in FIG. 10). It is fixed to. Further, the operation lever 33 is like a brake lever of a bicycle, and is attached to an operation handle 36,
Applying a force toward the operation handle 36 (operation lever 3
3 can be displaced by pulling it toward the operation handle 36), and can be returned by releasing the force. The operation wire 34 is formed by inserting an inner wire into a tube, and has one end connected to the operation lever 33 and the other end connected to the extension plate 32.

Further, the return spring 35 is provided between the support member 37 fixed to the shaft 8 and the extension plate 32, and is disposed in a displaced state shown by a chain line in FIG.
2 is returned to the neutral position shown by the solid line in FIG. In the case of the structure of the present example, the support plate 18 in the structure of the first example described above is used.
A coil spring is provided as a return spring 35 between the projecting piece 38 of the support member 37 having a projecting piece 38 provided on a part of the extension a and the extension plate 32. Note that, instead of such a configuration, a coil spring may be provided between a member fixed to the substrate 1 and the extension plate 32.

In the turning means 31 provided in the wheel-running brush cutter B of the present embodiment configured as described above, if a force toward the operation handle 36 is applied to the operation lever 33, the pair of wheels 10 is moved. 10 can be turned in the direction indicated by the chain line. That is, by applying a force toward the operation handle 36 to the operation lever 33, (the inner wire of) the operation wire 34 is pulled, and the extension plate 32 is
It is displaced to the right of 0. Accordingly, the pivot arm 12 to which the extension plate 32 is fixed is displaced from the solid line position in FIG. 10 to the chain line position, and another pivot arm 12 connected to the pivot arm 12 is connected to the pivot arm 12 (FIG. 10). Pivot arm 12 is simultaneously displaced in the same direction. As a result, the pair of wheels 10 turns synchronously. As described above, the pair of wheels 10 can be easily turned in one direction, so that the wheel-driven brush cutter B can be easily turned in the one direction.

In order to move the wheeled brush cutter B from the turning state to the straight traveling state, the force applied to the operation lever 33 is released, and the operation lever 33 is returned. In the turning means 31 constituting the wheel traveling brush cutter B of the present embodiment, the return spring 35 is provided, and by applying the force to the operation lever 33, the extension plate 32 is moved by the return spring 35.
It rotates against the elasticity of Accordingly, when the above-mentioned force is released, the above-mentioned operation wire 34 can return to the original state, and the extension plate 3 can be returned by the elastic force of the return spring 35.
2 returns to the original position (neutral position) indicated by the solid line in FIG. As a result, the pair of wheels 10 synchronize and return to the original state (non-turning state) via the pivot arm 12, the connecting arm 13, and the other pivot arm 12 to which the extension plate 32 is fixed. I do.

The turning means 31 of the wheel-running brush cutter B of the present embodiment is constructed and operated as described above. Therefore, when the operating lever 33 is pulled, the pair of wheels 10 is moved to the substrate 1
Can be turned in one of the width directions. Therefore, as described above, even when the mowing operation is performed in the orchard such as the tangerine, for example, the mowing operation can be easily performed while circling the orchard in one direction, so that the labor load does not increase. In addition, the position of the mowing unit 6 can be easily controlled. For this reason, the possibility of damaging the fruit tree is extremely reduced, and a smooth mowing operation can be performed. still,
In order that the turning direction of the wheel 10 is reversed from that in the illustrated example, an extension plate 32 for connecting the operation wire 34 is provided on the other (upper in FIG. 10) pivot arm 12. Furthermore, wheel 1
In order to make the wheel 0 freely pivotable in both directions as in the first example, a pair of operation handles 36 and operation levers 33 are provided, and a pair of extension plates 32 and operation wires 34 are also provided. The operation lever 33 can be configured to be freely operable.

Next, FIGS. 12 to 14 show a third example of the embodiment of the present invention. The structure of the present example is also characterized by the turning means 39, and the other configuration and operation are the same as those of the above-described second example. Therefore, the same reference numerals are given to the same parts, and the overlapping description will be omitted or simplified, and hereinafter, the description will be made focusing on the turning means 39 which is the characteristic part of this embodiment.

The turning means 39 constituting the wheel traveling type brush cutter C of this embodiment includes a turning plate 40 and an operation lever (not shown).
, An operation wire 34 and a return spring 35.
The revolving plate 40 is rotatably provided on the lower surface of the substrate 1 and supports a pair of wheels 10 at both ends thereof. For this purpose, upright walls 40a are provided at both ends of the revolving plate 40.
The operation lever is the same as the operation lever in the structure of the second example described above. Further, the operation wire 34 is the same as the operation wire in the structure of the second example described above,
One end is connected to the operation lever, and the other end is connected to one end (the upper end in FIG. 12) of the revolving plate 40.

Further, the return spring 35 includes a bracket 41 fixed to the substrate 1 and the other end of the revolving plate 40 (FIG. 1).
The lower end portion of the revolving plate 40 is returned to the original position (neutral position) shown by the solid line in FIG. As the return spring 35, a coil spring is employed. The return spring 35 may be provided between one end of the substrate 1 in the longitudinal direction (the left end in FIG. 12) or the portion fixed to the shaft 8 and the revolving plate 40. The end of the operation wire 34 is
It is supported by the bracket 41. Further, in the case of the structure of this example, a contact plate 42 is provided at one end of the turning plate 40, and a protruding pin 43 that contacts the contact plate 42 at a neutral position of the turning plate 40 is provided on a part of the substrate 1. By providing them, they serve as stoppers. In the case of this example, the projecting pin 43 is formed by screwing a bolt to a nut member fixed to a projecting plate 44 provided on the substrate 1.

In the case of the turning means 39 provided in the wheel traveling brush cutter C of the present embodiment configured as described above, if a force directed to the operation handle is applied to the operation lever, the pair of wheels 10 can be moved.
Can be turned as shown by a chain line in FIG.
That is, by applying a force toward the operation handle to the operation lever, the operation wire 34 is pulled and the revolving plate 4
0 rotates as shown by a chain line in FIG. As a result, the pair of wheels 10 provided on the revolving plate 40 are synchronized with each other as shown in FIG.
Turn as shown in. Since the pair of wheels 10 can be easily turned in one direction in this manner, the wheel traveling brush cutter C
Can be easily turned in one direction.

To change the wheel traveling brush cutter C from the turning state to the straight traveling state, the force applied to the operation lever is released, and the operation lever is returned. Turning means 3 in this example
9, the return spring 35 is provided, and by applying the force to the operation lever, the revolving plate 40
It rotates against the elasticity of the return spring 35. Accordingly, when the force is released, the operation wire 34 can return to the original state, and the resilient force of the return spring 35 returns the revolving plate 40 to the neutral position shown by the solid line in FIG. As a result, the pair of wheels returns to the original state (the state where the vehicle is not turning) in synchronization. Further, due to the presence of the stopper, the revolving plate 40 is prevented from being excessively rotated, and is correctly returned to the neutral position. When the wheel 10 is configured to be turned in the opposite direction to the illustrated example, members provided at one end and the other end of the revolving plate 40 may be provided at the other end and the one end opposite to the illustrated example. Respectively.

The turning means 39 of the wheel-running brush cutter C of the present embodiment is constructed and operated as described above. Therefore, when the operating lever is pulled, the pair of wheels 10 is moved in the width direction of the substrate 1. It can be turned in one direction. Therefore, as described above, even when the mowing operation is performed in an orchard such as tangerine, for example, the mowing operation can be easily performed while circling the orchard in one direction, so that the labor load does not increase, and The position of the mowing unit can be easily controlled. For this reason, the possibility of damaging the fruit tree is extremely reduced, and a smooth mowing operation can be performed.

[0047]

Since the wheel-running brush cutter according to the present invention is constructed and operated as described above, the brush cutter is performed in an orchard with shelves or an orchard or a vinyl house provided on a slope. Even in this case, this mowing operation can be easily performed. For this reason, the labor burden does not increase, and the position of the mowing part can be easily controlled. As a result, the possibility of damaging the fruit tree is extremely reduced, and a smooth mowing operation can be performed, which has a large practical effect.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first example of an embodiment of the present invention.

FIG. 2 is a plan view of a main part for describing a configuration of a turning unit.

FIG. 3 is a side view of the main part.

FIG. 4 is a longitudinal sectional view of the same.

FIG. 5 is a partial perspective view illustrating a first engagement unit.

FIG. 6 is a side view showing a member provided on the shaft, with a part thereof omitted;

FIG. 7 is an end perspective view of the same.

FIG. 8 is a partial perspective view showing a portion where a chrysanthemum is provided.

FIG. 9 is a perspective view showing a second example of the embodiment of the present invention.

FIG. 10 is a plan view of a main part for describing the configuration of the turning means.

FIG. 11 is a side view of the main part.

FIG. 12 is a plan view of an essential part for describing a configuration of a turning means according to a third example of the embodiment of the present invention.

FIG. 13 is a side view of the main part.

FIG. 14 is a longitudinal sectional view of the same.

[Explanation of symbols]

 A, B, C Wheel traveling brush cutter 1 Substrate 2 Engine 3 Cutting unit 8 Shaft 9 Operating handle 10 Wheel 11 Turning means 12 Pivot arm 13 Connecting arm 14 Rotating plate 17 Transmission rod 18 Support plate 19 Return spring 20 First spring 21 engaging means 26 chrysanthemum seat 27 pivotal support 31 turning means 32 extension plate 33 operating lever 34 operating wire 35 return spring 39 turning means 40 turning plate

Claims (9)

[Claims] 1. A power source fixed to an upper surface of a substrate, a mowing portion provided so as to protrude from one longitudinal edge of the substrate and operated by the power source, and a mowing portion provided at the other longitudinal end of the substrate. A shaft having a base end fixed and extending obliquely upward, an operation handle provided at the distal end of the shaft, a pair of wheels provided at both ends in the width direction of the substrate, and operating the operation handle And turning means for turning the pair of wheels in at least one direction.
Wheel-running brush cutter. 2. A pair of pivot arms, each of which pivotally supports the wheel at one end thereof, and pivots one end of each of the pivots at both ends in the width direction of the substrate. A connecting arm for connecting the other ends of the pivot arms, a turning plate provided rotatably on the shaft and fixing the operation handle, and first and second transmission plates fixed to both ends, respectively. Engaging the first transmission plate and the connecting arm by the first engagement means, and engaging the second transmission plate and the rotating plate by the second engagement means. By the rotation of the operation handle, a transmission rod that rotates in the direction of rotation of the operation handle to rotate wheels via the connecting plate and the pair of pivot arms, and returns the operation handle to a neutral position. The wheel traveling type according to claim 1, further comprising a return spring for causing the wheel to travel. Brush cutter. 3. The shaft according to claim 2, wherein a support plate is fixed to a distal end side of the shaft while the transmission rod is inserted, and the return spring is provided between the support plate and the rotating plate. Wheeled brush cutter. 4. The first engagement means comprises a hole formed in the first transmission plate, and a protruding pin formed in the connection plate and engaging with the hole. The second engaging means comprises a hole formed in the second transmission plate and a projecting pin formed in the rotating plate and engaging with the hole. A wheel-driven brush cutter according to any one of the above. 5. A chrysanthemum seat is provided at an intermediate portion of the shaft so that the first half portion of the shaft can be folded up at a desired angle and a pivotal support portion is provided at a position corresponding to the chrysanthemum seat of the transmission rod. The wheel-running brush cutter according to any one of claims 1 to 4, wherein the transmission rod is provided so as to be able to be turned upright as the shaft is turned up. 6. A pair of pivot arms, each pivotally supporting the wheel at one end thereof and pivoting one end to both ends in the width direction of the substrate, and a pair of pivots. A connecting arm connecting the other ends of the supporting arms, and an extension plate fixed to one of the pair of supporting arms in a state of extending toward the center in the width direction of the substrate. An operation lever attached to the operation handle, which is displaceable by applying a force toward the operation handle, and which can be returned by releasing the force, and one end of which is connected to the operation lever, and A return spring provided between the extension plate and a member fixed to the shaft or a member fixed to the substrate, and a wire having the other end connected thereto, and returning the pivot arm in a displaced state to a neutral position. The method according to claim 1, comprising: Wheel-running brush cutter. 7. The turning means is rotatably provided on the lower surface of the substrate, and is provided at both ends of the turning means for pivotally supporting the wheels, and the operation handle, and applies a force toward the operation handle. An operating lever that is displaceable by applying and that can be returned by releasing the force, a wire having one end connected to the operating lever and the other end connected to one end of the revolving plate, and a wire fixed to the shaft. 2. A return spring provided between a member or a member fixed to the substrate and the other end of the turning plate, for returning the turning plate in a displaced state to a neutral position.
A wheel-driven brush cutter according to claim 1. 8. The wheel-running brush cutter according to claim 7, wherein a stopper is provided at a neutral position of the swivel plate to contact a member fixed to the swivel plate. 9. The wheel-running brush cutter according to claim 6, wherein a chrysanthemum seat is provided at an intermediate portion of the shaft so that the first half portion of the shaft can be folded up at a desired angle. .